+# -e <pid> case
+elif [[ "$1" -eq "-e" && "$2" =~ ^-?[0-9]+$ ]]; then
+ if `ps $2 > /dev/null 2>&1`; then
+ echo "you win!"; exit 0;
+
+ else
+ echo -ne "invalid pid\n$USAGE"; exit 1
+
+# -s <pid> <regex> case
+elif [[ "$1" -eq "-s" && "$2" =~ ^-?[0-9]+$ ]]; then
+ if `ps $2 > /dev/null 2>&1`; then
+ echo "you win!"; exit 0;
+
+ else
+ echo -ne "invalid pid\n$USAGE"; exit 1
+
+else
+ echo "$USAGE"; exit 1